The present invention provides a method for the treatment or prevention of conditions which can be ameliorated by Smo antagonism, which method comprises administration to a patient in need thereof of an effective amount of a compound of formula I or a composition comprising a compound of formula I:
or a pharmaceutically acceptable salt or solvate thereof; wherein:
2 of X, Y and Z represent nitrogen atoms, and the other represents an oxygen atom;
R
1
and R
2
are taken together with the atom to which they are attached and represent a cyclobutyl ring, optionally substituted with 1-2 fluorine atoms, and R
3
represents hydrogen or a fluorine atom;
or
R
1
represents methyl,
R
2
represents methyl or a fluorine atom and
R
3
represents a fluorine atom.
本发明提供了一种用于治疗或预防可以通过Smo拮抗改善的疾病的方法,该方法包括向需要的患者施用化合物I的有效剂量或包含化合物I的组合物:或其药学上可接受的盐或溶剂;其中:X、Y和Z中的2个表示氮原子,另一个表示氧原子;R1和R2与它们连接的原子一起表示一个
环丁基环,可选地取代1-2个
氟原子,R3表示氢或
氟原子;或R1表示甲基,R2表示甲基或
氟原子,R3表示
氟原子。